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ferret/pkg/stdlib/html/driver/driver.go
2018-09-26 22:03:06 -04:00

47 lines
1.1 KiB
Go

package driver
import (
"context"
"fmt"
"github.com/MontFerret/ferret/pkg/runtime/core"
"github.com/MontFerret/ferret/pkg/runtime/values"
"github.com/MontFerret/ferret/pkg/stdlib/html/driver/dynamic"
"github.com/MontFerret/ferret/pkg/stdlib/html/driver/static"
)
type DriverName string
const (
Dynamic DriverName = "dynamic"
Static DriverName = "static"
)
type Driver interface {
GetDocument(ctx context.Context, url string) (values.HtmlNode, error)
Close() error
}
func ToContext(ctx context.Context, name DriverName, drv Driver) context.Context {
return context.WithValue(ctx, name, drv)
}
func FromContext(ctx context.Context, name DriverName) (Driver, error) {
val := ctx.Value(name)
drv, ok := val.(Driver)
if ok {
return drv, nil
}
return nil, core.Error(core.ErrNotFound, fmt.Sprintf("%s driver", name))
}
func WithDynamicDriver(ctx context.Context, addr string) context.Context {
return context.WithValue(ctx, Dynamic, dynamic.NewDriver(addr))
}
func WithStaticDriver(ctx context.Context, opts ...static.Option) context.Context {
return context.WithValue(ctx, Static, static.NewDriver(opts...))
}